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酔{よ}う and 酔{よ}っ払{ぱら}う both seem to mean "to get drunk" but how are they different from each other? Does it depend on how drunk you are, and assuming 酔っ払う is worse than 酔う, exactly how drunk would you need to be to cross from 酔う to 酔っ払う? Does the 払う part has any meaning or purpose?